package com.dgut.finaldemo.util;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtil {

    private static final String SIGN = "yuzhiguang";

    //生成token  header\payload\sign
    public static String getToken(Map<String,String> map) {
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.MINUTE,30);//半小时失效

        JWTCreator.Builder builder = JWT.create();

        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });

        String token = builder
                .withExpiresAt(instance.getTime())
                .sign(Algorithm.HMAC256(SIGN));
        System.out.println(token);
        return token;
    }

    //验证获取
    public static DecodedJWT verify(String token){
        return JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
    }


}
